Clutch



May 18 192s. 1,585,172

. G. SAUNDERS CLUTCH Filed Jan. 9, 1922 3 Sheets-Sheet 1 INVENTOR. g-gz idan/x mmadww A TTO 1 EYS.

May 18 1926.

GJSAUNDERS CLUTCH s sheets-sheet 2 Filed Jan. 9, 1922 EL i if I! @v INVENTORI,

gum Y May 18 1926.

G. SAUNDERS CLUTCH Filed Jan. 9, 1922 3 Sheets-Sheet 5 INVENTOR.

GORDON SAUNDERS, OF

crates.

VJHITTIER, CALIFORNIA.

CLUTCH.

Application filed January This invention relates to clutches and is particularly directed to friction clutches adapted for high speed power drives.

An object of the invention is to provide an improved type of band clutch including a clutch band having no fixed point of support and in which all parts of the band have a movement to and from the cooperating clutch drum; also to provide improved means for supporting the ends of the clutch bands in such a way as to insure that they will be held entirely clear of the drum with which they cooperate. When the device in eludes a shackle for supporting the ends of the clutch band, one of the objects of the invention is to construct this shackle so as to provide an effective support for its rock shaft and so that it will afford an improved means for attaching the ends of the band.

Another object is to provide a clutch of the above character in which the clutch band 4 is positively held out of contact with the clutch drum throughout its entire circumference when the clutch is thrown out.

A further object is to provide means for cooling the clutch.

Further objects of the invention will appear hereinafter.

Various other objects and advantages will 30 be more fully apparent from the following description of the accompanying drawings which form a part of this disclosure, and which illustrate a preferred embodiment of the invention.

Of the drawings:

Fig. 1 is a plan view showing a power mechanism in which my improved clutch is incorporated.

Fig. 9. is an enlarged side elevation thereof.

lt' ig. r 1g. 2.

Fig. 4: is an enlarged longitudinal section on line 4-4 of Fig. 1.

Fig. 5 is a. transverse section on line 5 of Fig. 1.

Fig. 6 is an enlarged portion of Fig. 5 partly broken away to more clearly illustrate certain details of construction, and

Fig. 7 is a perspective View illustrating the clutch band carrying and operating means.

The mechanism illustrated in the drawings is especially adaptable as a power drive for 55 oil well equipment and for cooperation with a hi gh speed power unit such as an internal 3 is a detail section on line 3-3 of 9, 1922. Serial 1:10. 527,984.

combustion engine, the general arrangement of the mechanism including a drive shaft 1 journaled in bearings 2 carried by a supporting frame. The drive pulleys 3 and 4 revolve loosely on the shaft and clutch bands and associated operating mechanism rotate with the shaft, the clutches alternately engaging the pulleys to cause one or the other to rotate with the shaft. In one arrangement the forward drive pulley 3 is connected by a straight belt 5 with a pulley 6 on a driven shaft 7, and the reverse drive pulley 4 is connected by a crossed belt 8 with a pulley 9 on the shaft 7. Referring particularly to Fig. t it will be seen that each of the pulleys 3 and i, which are of duplicate construction, is journa-led on the shaft 1 on roller bearings 10 and has an axially projecting clutch drum 11 with which the clutch band cooperates.

It will be understood that as each of the clutch bands rotate with the shaft, when one of the pulleys 3 or f is clutched in to rotate with the drive shaft 1, the opposite drive pulley will, through its driving connection with the driven shaft 7, be rotated in a reverse direction at an equal speed, the resulting difference in relative speed of rotation of the inactive clutch band and its companion idle clutch drum will be twice the speed of the driven shaft.

Under such conditions, even with the clutch band which is held normally free from contact with its companion clutch drum, it is desirable that some means be provided for cooling the clutch, especially as in equipment of the character illustrated the drive shaft has a speed of upwards of 500 revolutions per minute.

In the present instance the pulleys 3 and 4t haveradial fins 12 and the inner web 13 has a series of axially disposed openings 1% positioned exterior of the drum 11 and adjacent the outer periphery thereof.

By this construction the fins 12 propel the air within the pulley and by centrifugal action it is forced to the inner periphery of the pulley where it escapes axially through the interior of the drum 11 and through the openings 14, as indicated by the arrows in Fig. 41, and serves to cool the drum and the clutch band.

lhe respective clutch bands are of two part construction, as will later be described in detail, and each part thereof is operated by a clutch operating arm 15 which extends talize any tendency of the arm to in i f shit-tin lev r and inwardl ahd has jonrnaled in its inirer end a roller 16 which normally is helc the drive shaft hy espring 1T,

1 having it Weigh liinh l ser I n entl move under the influence o1 centri'rngal action.

The mechanism "thro'ving in the utilized posed clutches, QOi lPl'lSQ splined to the "3 11 1 1 chimed o s ice oi iiFlatei'alshitting lever 26 r v j i i itical lnnh oninaled'in a'hrzt *iset 5. "as part hit thei raineht th machine. it 1111128 1's ii' ected with s: itlh ve nay ee tiny "suitable for n of ,nianipnlating ineans.

her

"tidn to throiv iii'either'ofthe'clntehes, the i aprepriatetime he'ng thrown i by the ea l plat'es e'ng; 'iil' the rollers I! and tamingthe iirins l'o radi:Qllj, oiitiraid, this iiiie oz'iirni tl action, aswill be @1151;

"1 ch 'ch drinn 11.

f shaft 36 upon the outere hand preferably t\ \'o""sl'ackles,l aii'd connect one end of the clntch hand or cinteli he; d seg n'ients t'o tl 'shiclzleso onit' inoves at cinn'tei and inward ton rd the drain,

nieans lei-"e51" a po'ih't' subs chiiilg hell 'nei'v describe (lead i "sarnec stance iir'iis or the dre time for l he clutch ha is c one ier H to the shaft a l vided with 'a hub naviii op posite 33 amplates seel ligs. 5 Cally opposite lOCtLt lQLS v-iehs or brackets 34, each with infinvmrdli projecting e (se I i Fig i) each said cl ns ing as hearing for a stn -sh: rt er rocln one ournal companion hitch epee. li arni 5 is rigidly secured, so that the 'zzrni e nds radially toitard the eentral pzirt oi" the drum.

the" presentinstance disc in the 'region" of-each shaft 86 is out an plate 37 secured to the disc forms the oppetwo for alternately construction eachcoinprising henietni hand is secured a 'l'iraclietto the opposite whraclret -1 .'"Sa1d liraclretdtl is, provided w th two reiatwel} spaced hole degree of cl limb of the l 'c'oi'inectet with manual or automatic direo' J tance trein the axis Oil/bile crur it 36; thebis't'o sajg it' is snl stantiallv on the "same circumferential line as the axis t the shaft 36, with reference to the cei'iten oi the l! L d'iiiii1;'lie11ce the'line or direction et pull 'teing ci late 'al I clutch or which the 'dO'o't the shaitsBG. Also iii the re cli shaft, and 'nwardlv v rind a'tleta chable site journal bearing fdr the shaft. Each shaft 36 rigidly carries a toggle or shackle compr sing ivo out-vardly netended relaaee'd arihs 38 in the outer ends of which is secured a transverse stud 39, and inwardly of said stud the shaft has an eccentric Wrist, lortion or pin 40. The two semi-circular clutch bands are ot duplicate 45 to n'hich is secured by rivets or otherwise a clutch lining Vi?) of asbestos or of other suitable lllttt'eflill. To one endot eat-h hand L7 journaled on the ot the sha'tt members 36 and. end'ol said band 4-5 1s secured stud 3;) of one Kb 4:9, each connectedhy e yoke to the eccntrieportien 01" pin i'O oi the toggle shaft Springs the res; tive belts if)"mtween s off-pivot ienihers and the d the ends of said hol are nuts 52 h which the action 01": the clutch hand upon the dri-inrinay he regulated. 'In' 6 tie clutch operating arm 15 and theshtlftee shown in normal releasing position in full lines, and in clutching posi 'tion' in dottedlines.

i i engaged it will he noted tl at during elclutching operet-ieh that the stud 39 travels"circtzinferentially, that is, in a gene'al tangential direction, but inwardly "elative to the clutch drnni as indicated by the dotted line a; this .pnlls one end of the clutch bend circinni 'ere'ntially and inwardly, and the eccentric portion or pin d0 oi the Stravcls approximately in :1 dir ctioi radial relative to the drive shaft, indicated by the dotted line Z), Whichh ings the opposite end oi the clutch hand t0'\.ards and against the clutch drum.

The Dill 10 is at snhstantiall}, the san'ie Li i as the she this end of the clntchhand is in line vith the Set the rock :1 This tends to keep the shackle jtroni chatirihrirtting when in use.

i roni consideration oilt'his -itrnctnre and operation it will he'evident that the present invention provides a clutch band having no the niovah e one e'ndof each unitisvlnoved circnnrferein tiall d innad'lv and the other 'inoved J iitlliillj,relativet0 the drive shaft.

The provision of the detachable plates 37 contributes to a convenient and rapid removal of the shaft 36 of the toggles or shackles. Such removal is accomplished by first removing the nuts 52 from the bolts 4-9 after which the plates 3'? are detached from the disc 30, this permitting the shaft 36 together with the arms 15, plate 3'7 and clutch bands 45 to be removed as a unit.

The use of the bracket 34: is most advantageous because it enables the toggle shaft to be supported at both ends with the points of attachment of the bands located between the supporting points.

If it is desired to remove only the clutch bands, this may be accomplished by first withdrawing the cotter pins 55 and then removing the stud 39 to release one end of such clutch band. By removing the adjusting nuts 52 the opposite end of the respective ban d is released and the band may then be removed. for repair or replacement.

The form of mechanism here shown and described, while well adapted to fulfill the objects primarily stated, is susceptible of embodiment in various other forms without departing from the broad scope of the present invention, therefore it is not intended to confine the invention to the one form of embodiment herein illustrated and described as it contemplates all such modifications as come within the scope of the following claims.

What is claimed is as follows:

1. In a device of the cl as described, a shaft, a driving ineniber carried thereby, a driwm clutch-drum. a clutch-band mounted to cooperate with the drum, a shackle hav ing a rocl :-shaft, an arm attached to the rock-shaft and extending inwardly toward the shaft, means for attaching the live end of the clutch-baud to the shackle at the side of the rock-shaft remote from the shaft, means for attaching the dead end of the clutch-band to the shackle between the point of attachment of the said live end and the drum, and a spring cooperating with the last named attaching means at the dead end of the band for ncrmally holding the clutchband oil of the drum, and means for moving the arm to actuate the shackle and tighten the clutch-band on the drum.

2. In a device of the class described, a driving luen'iber, a driven clutch drain, a clutch band adapted to grippingly engage the drum and compris ig two substantially seiui-circular units, and means associated with the adjacent ends of the units and functioning to more the end of one unit circumferentially and inwardly and the cud of the opposite unit substantially radially and toward the clutcii drum, and a spring connected with the dead end of each unit for holding the dead ends out of contact with the drum when the band is loose.

3. In a device of the class described, a

driving member, a driven clutch drum, opposed rocking members carried by the driving men'iber, each having a stud movable cireuniferentially and inwardly, and an cecentric pin near the axis on which the rocking member rocks, and movable ra 'ially relatire to the drum, said pins being at substantially the same distance as said rocking axes from the axis of the drum and a-pair of semi-circular clutch band units each carried by the stud of one rocking member and the eccentric pin of the opposite rocking membcr whereby the dead end of each clutch band unit is moved substantially radially into and out of gripping engagement witl the drum, and the pull in the dead end oil each band is exerted substantially in line with the axis on which the rocking member rocks.

at. In a clutch, the combination of a driven clutch drum, a rotary member adjacent the drum and having a laterally projecting bracket with an arm at the outer end thereof, a shackle mounted on a rocking axis in the rotary member and the St id arm, said shackle having a pair of oppositely disposed arms with a connecting stud therebetween, said shackle also having an eccentric pin near the rocking axis of the shackle and at substantially the same distance as the rocking axis from the axis of the drum, a clutch band having one end attached to the stud and having its dead end attached to the eccentric pin, said stud and pin being located so that when the shackle is rocked on its axis the first named end of the clutch band moves eireumferentially and toward the drum and the dead end of the band moves substantially radially inwardly against the face of the drum.

5. In a clutch, the combination of a driven clutch drum, a rotary member adjacent the drum, said rotary member having a pair of oppositely disposed shackles, each shackle having an axis of rotation on the. rotary member near the face of the drum and on which it may r ck, and each shackle further having an outwardly projecting arm carrying a stud, and an eccentric pin disposed at substantially the same distance as the rocking avis from the axis of the drum, a substantially semi-circular clutch band attached at one end to the stud of one shackle and at its dead end to the pin of the other shackle,

and a second clutch band having its dead. end

attached to the remaining pin of one shackle and the remaining stud of the other shackle, and means for applying a rocking force to the shackles whereby the stud of each shackle pulls its adjacent end of the clutch bands circnmterentially and against the face of the drum, and each eccentric pin moves its corresponding dead end substantially radially inwardly against the face of the drum.

6. In a clutch, the combination of a driven eiutehjdi'u n eii oiupy nen'i'iie uijieeent the (1111111,? shackle mounted fe rock on an, (LX155 near the i gz 'e of the drum hzu i and the axis of he 9.5mm, aehitch bend having its live end eit a hed pivot-ally to. said stud ui il, means including 21h, udjustii g bolt utt-ziehed $10 the dead end 01" the build and figiVetally, attached tne eeeentrie pin,

whereby when the shackle is rocked on its plizd 115* pm-b mounted j Signed at Les 13th day of December, 1021.

eiiy in .1 and spf the em "L0 11 We longitudinally along the axis of the drum for actuattheghaekieu div uhetunti g wards the means in- Angeles, California this GORDON SAUNDERS. 

